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Platelets Cellular and Functional Characteristics in Patients with Atrial Fibrillation: A Comprehensive Meta-Analysis

Alexander Weymann1, Sadeq Ali-Hasan-Al-Saegh2, Anton Sabashnikov3,4

  • 1Department of Cardiac Surgery, University Hospital Oldenburg, European Medical School Oldenburg-Groningen, Carl von Ossietzky University Oldenburg, Oldenburg, Germany.

Medical Science Monitor Basic Research
|March 18, 2017
PubMed

Insights

Platelet characteristics like count and size are linked to atrial fibrillation (AF) and stroke risk. This meta-analysis confirms platelets significantly influence AF occurrence.

Area of Science:

  • Cardiology
  • Hematology
  • Biomedical Science

Background:

  • Platelet cellular and functional characteristics are increasingly recognized as potential contributors to cardiovascular diseases.
  • Understanding the association between platelet parameters and atrial fibrillation (AF) is crucial for risk stratification and management.
  • Previous studies have suggested links between platelet indices and AF, but a comprehensive synthesis of evidence was lacking.

Purpose of the Study:

  • To systematically review and meta-analyze observational studies evaluating the association of platelet count (PC), mean platelet volume (MPV), platelet distribution width (PDW), platelet factor 4 (PF4), beta thromboglobulin (BTG), and p-selectin with the occurrence of AF and consequent stroke.
  • To determine the strength of evidence for these associations.

Main Methods:

  • A meta-analysis of observational studies was conducted, including patients with paroxysmal, persistent, and permanent atrial fibrillation.
  • A comprehensive literature search was performed across major databases, identifying 73 relevant studies from 1,676 initial retrievals.
  • Subgroup analyses were employed to investigate potential sources of heterogeneity.

Main Results:

  • Pooled analysis revealed significant differences in multiple platelet parameters between AF patients and sinus rhythm (SR) controls.
  • Specifically, platelet count (PC) was significantly lower in AF patients (WMD=-26.93, p<0.001).
  • Mean platelet volume (MPV) (WMD=0.61, p<0.001), platelet distribution width (PDW) (WMD=-0.22, p=0.002), beta thromboglobulin (BTG) (WMD=24.69, p<0.001), platelet factor 4 (PF4) (WMD=4.59, p<0.001), and p-selectin (WMD=4.90, p<0.001) were significantly altered in AF patients.

Conclusions:

  • Platelets play a critical and precipitating role in the occurrence of atrial fibrillation.
  • Elevated platelet activity markers (BTG, PF4, p-selectin) and altered platelet size distribution (increased MPV, decreased PDW) are associated with AF.
  • The findings underscore the importance of platelet function in AF pathogenesis and suggest potential therapeutic targets.

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